body{
    background-color: #f6f6f6;
    font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
}

.container{
    width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.container:focus{
    outline:0px;
}

img{
    margin-left: auto;
    margin-right: auto;
    border-radius: 1%;
}

.round{
    border-radius: 100px;
}

a{
    text-decoration: none;
}